Add 90/12 and 6/18, Solve 7 6/12 + 6/18 as a fraction

Add 90/12 and 6/18

1^st number: 7 6/12, 2^nd number: 6/18

90/12 + 6/18 is 47/6.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 18 is 36

Next, find the equivalent fraction of both fractional numbers with denominator 36
For the 1st fraction, since 12 × 3 = 36,
90/12 = 90 × 3/12 × 3 = 270/36
Likewise, for the 2nd fraction, since 18 × 2 = 36,
6/18 = 6 × 2/18 × 2 = 12/36
Add the two like fractions:
270/36 + 12/36 = 270 + 12/36 = 282/36
282/36 simplified gives 47/6
So, 90/12 + 6/18 = 47/6
In mixed form: 75/6

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad